Aim: A modifier class that quantifies any colormap into a given number of colors. It is particularly useful when rendering colored objects, since for instance blender is very slow to load many different materials. More...

#include <DGtal/io/colormaps/QuantifiedColorMap.h>

Public Types
using	ColorMap = TColorMap

using	Self = QuantifiedColorMap< ColorMap >

using	Value = typename ColorMap::Value

Public Member Functions
	BOOST_CONCEPT_ASSERT ((concepts::CColorMap< TColorMap >))

	QuantifiedColorMap (Clone< ColorMap > colormap, int nb=50)

Color	operator() (const Value &value) const

Data Fields
ColorMap	myColorMap
	the colormap that is quantified

int	myNbColors
	the maximum number of colors

Detailed Description

template<typename TColorMap>
struct DGtal::QuantifiedColorMap< TColorMap >

Aim: A modifier class that quantifies any colormap into a given number of colors. It is particularly useful when rendering colored objects, since for instance blender is very slow to load many different materials.

Description of template class 'QuantifiedColorMap'

Template Parameters

TColorMap an arbitrary model of concepts::CColorMap.

Definition at line 66 of file QuantifiedColorMap.h.

Member Typedef Documentation

◆ ColorMap

template<typename TColorMap >

using DGtal::QuantifiedColorMap< TColorMap >::ColorMap = TColorMap

Definition at line 69 of file QuantifiedColorMap.h.

◆ Self

template<typename TColorMap >

using DGtal::QuantifiedColorMap< TColorMap >::Self = QuantifiedColorMap< ColorMap >

Definition at line 70 of file QuantifiedColorMap.h.

◆ Value

template<typename TColorMap >

using DGtal::QuantifiedColorMap< TColorMap >::Value = typename ColorMap::Value

Definition at line 71 of file QuantifiedColorMap.h.

Constructor & Destructor Documentation

◆ QuantifiedColorMap()

template<typename TColorMap >

DGtal::QuantifiedColorMap< TColorMap >::QuantifiedColorMap	(	Clone< ColorMap >	colormap,
		int	nb = 50 )

inline

Constructor from colormap and nb colors

Parameters

[in]	colormap	the colormap to quantify in nb colors.
[in]	nb	the targeted maximum number of colors (default is 50).

Definition at line 79 of file QuantifiedColorMap.h.

80 : myColorMap( colormap ), myNbColors( nb )

81 {}

DGtal::QuantifiedColorMap::myColorMap

ColorMap myColorMap

the colormap that is quantified

Definition QuantifiedColorMap.h:101

DGtal::QuantifiedColorMap::myNbColors

int myNbColors

the maximum number of colors

Definition QuantifiedColorMap.h:103

Member Function Documentation

◆ BOOST_CONCEPT_ASSERT()

template<typename TColorMap >

DGtal::QuantifiedColorMap< TColorMap >::BOOST_CONCEPT_ASSERT ( (concepts::CColorMap< TColorMap >) )

◆ operator()()

template<typename TColorMap >

Color DGtal::QuantifiedColorMap< TColorMap >::operator() ( const Value & value ) const

inline

Computes the color associated with a value in a given range.

Parameters

value A value within the value range.

Returns: A color whose brightness linearly depends on the position of [value] within the current range.

Definition at line 88 of file QuantifiedColorMap.h.

    {
      const Value rel  = ( value - myColorMap.min() )
        / ( myColorMap.max() - myColorMap.min() );
      const Value qrel = round( myNbColors * rel ) / myNbColors;
      const Value outv = qrel * ( myColorMap.max() - myColorMap.min() )
        + myColorMap.min();
      return myColorMap( outv );
    }